作　　者： ; ; ; ;

机构地区： 东北大学

出　　处： 《矿业研究与开发》 2003年第5期8-11,共4页

摘　　要： 应用东北大学自行研究开发的岩石破裂过程分析系统(SFPA2D),对开采浅埋煤层引起的覆岩顶板破断动态过程进行了数值模拟研究,得出了分步开挖的覆岩弹模与剪应力分布图、地表下沉位移图和煤层顶板应力分布图。通过对模拟结果的分析,揭示了浅煤层开采过程中覆岩破坏的冒落带、裂隙带、弯曲带及矿压分布、地表变形的基本规律。实例模拟得出的地表下沉值与实际观测结果基本吻合。 In this paper, the numerical simulation of the process of the overlying roof stratum braking cased by excavating the shallow-lying coal seam is carried out by the use of the Strata Failure Process Analysis programme (SFPA2D) which is developed by Northeastern University self, the elastic modulus and shear stress distribution patterns, the displacement curves of ground surface subsidence and the stress distribution in the roof stratum of coal seam for step-by-step excavation are gotten out. Through analyses of the results obtained from the numerical simulation, the caving, fracturing and bending zones in overlying stratum failing, and the basic laws of coal seam pressure distribution and ground surface deformation during excavating shallow-lying coal seam have being revealed. The values of ground surface subsidence obtained from the example numerical simulation approach to the measured ones extremely. 

关 键 词： 浅埋煤层 覆岩层破断 数值模拟 数值模型 应力分布

领　　域： [矿业工程] [矿业工程]